For Gem Enthusiasts

Gemologists use the hot point test to determine if a piece is a plastic imitation or coated in wax. Learn more about this destructive test here.

Gemologists may immerse gems in refraction fluids during examinations. This refractive index list of household liquids offers some common alternatives.…

What do you need to know about starting a gem cutting business? These basic rules cover topics from buying and cutting rough to getting along with…

The traditional November birthstone, topaz is a popular gem. Although frequently associated with golden yellow as well as blue, it can be found…

Gemstone scratch testing can help determine the Mohs hardness value of a mineral sample. Learn how to conduct this destructive gem test safely.…

Non-destructive tests are critical for gemologists trying to identify gems. Learn how measuring thermal properties, especially thermal inertia,…